Use the arrow keys! You can use the engine if you want. Jump around and play through the 5 levels! Don't hold down the up arrow and left/right at the same time, you won't move.
It's currently in an unfinished state. I will post all of the new updates here! UPDATE 3; First in a series of updates that will make this game MUCH better to play and to look at! UPDATE 2: Internal changes. Most everything's in one script now, in preparation for big big changes. UPDATE 1: MUCH better physics engine. He bobs up and down slightly, but if he didn't, he'd get stuck in the floor. Oh, and if you have any problems with it post them in the comments.